Since the tab stops algorithm is applied over the whole paragraph, but not on a single line, tabs’ size is dependent on the current layout. Thus, calculating the “real” tabs’ width when exporting to html, would be incorrect for any paragraph that is arranged on more than one line. To avoid such discrepancy, RadRichTextBox uses the tab stops’ width instead. A similar approach is also used in MS Word.

As an easy workaround for tabular formatting of a html file, one can use an invisible table to model this behavior.